<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>demo</title>
    <script type="text/javascript" src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <form action="###">
            <!-- 
              单选框无论个数多少,都是单选,
              所以data中只需要用一个字符串类型保存当前的value值即可
             -->
            <input type="radio" name="sex" value="男" v-model="sex">男
            <input type="radio" name="sex" value="女" v-model="sex">女
            <input type="radio" name="sex" value="未知" v-model="sex">未知
          </form>
    </div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false
    const vm = new Vue({
        el: "#app",
        data() {
            return {
            sex: ""
        }
        }
    })
</script>

</html>
